针对道路养护管理中缺乏车辙精确边界自动分析提取的问题,提出一种基于点云分水岭算法的路面车辙三维轮廓提取方法。首先对单车道路面激光点云数据进行高程归一化处理,消除路面横向设计坡度影响;利用包络线算法计算路面横断面的相对深度,生成路面点云相对深度模型,用于增强车辙辙槽的凹陷特征,并消除路面纵向坡度对点云分水岭算法的影响;然后,通过计算车辙边界曲率特征获取车辙粗略分界线,据此将路面划分为5个区域,选择每条横断面在对应区域相对深度最大的点作为点云分水岭算法的注水点集;最后,根据分水岭算法积水浸没的原理精确获取车辙的纵向轮廓。利用青岛平度市内S218省道的路面车辙激光点云数据进行实验分析。结果表明:所提方法可准确提取多类型的车辙边界,获取的车辙轮廓纵向边界均方根误差小于5 cm;同时,基于车辙边界获得的车辙深度均方根误差均小于1.5 mm,包络线法计算的车辙深度均方根误差均大于1.5 mm,所提方法具有更高的精度。所提方法为道路养护管理提供了一种有效的车辙三维轮廓提取方法。 

基于点云分水岭算法的路面车辙三维轮廓提取方法

To evaluate rutting based on driving quality of vehicles, three pavement models were established in view of the morphological characteristic of pavement ruts and friction coefficients, and the control models of vehicles conducting the braking were established according to different driving conditions. Lateral acceleration, roll angle, yaw angle, and lateral offset were adopted to describe the driving quality and safety of vehicles. The effects of different rut depths and width–height ratios on driving quality of vehicles under different driving conditions were analyzed. Results show that when a vehicle drives across a rut on a dry pavement at a speed of 100 km/h, the rut depth should be less than 20 mm to ensure the driving stability of vehicle. Road engineers and researchers should pay attention to this situation that width-height ratios of sidewall are 1 or smaller. When one wheel of a vehicle is braked in a rut groove with water, the driving speed of vehicles should be strictly controlled within 120 km/h, and the rut depth for road with a high driving speed should be less than 10 mm to ensure the driving stability and safety. The presented findings may make a contribution to maintenance decision-making.

Evaluation of Pavement Rutting Based on Driving Safety of Vehicles

Rutting is one of the important factors for vehicle hydroplaning in raining days Based on the analysis of vehicle driveability and lateral stability on the pavement covered by water, the rutting safety evaluation method considering driving safety under the condition of road waterlogging was put forward Using the Car Sim software to simulate vehicle lateral offset and lateral acceleration with different speeds, the rutting evaluation indicators on driving safety were set up It shows that vehicle lateral offset and lateral acceleration increase quickly and exceed the safety threshold easily when more than 80km/h speed On the rutting pavement covered by water, vehicle lateral offset may exceed the safety threshold firstly, and the vehicle may lose its driveability when rutting length is long enough to arrive the instability threshold

Simulation Analysis of Rutting Length Based on Driving Safety Under Condition of Road Waterlogging

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Simulation Analysis of Rutting Length Based on Driving Safety Under Condition of Road Waterlogging